×
INTELLIGENT WORK FORUMS
FOR ENGINEERING PROFESSIONALS

Log In

Come Join Us!

Are you an
Engineering professional?
Join Eng-Tips Forums!
  • Talk With Other Members
  • Be Notified Of Responses
    To Your Posts
  • Keyword Search
  • One-Click Access To Your
    Favorite Forums
  • Automated Signatures
    On Your Posts
  • Best Of All, It's Free!
  • Students Click Here

*Eng-Tips's functionality depends on members receiving e-mail. By joining you are opting in to receive e-mail.

Posting Guidelines

Promoting, selling, recruiting, coursework and thesis posting is forbidden.

Students Click Here

Jobs

Keeping memory in "smart relay"

Keeping memory in "smart relay"

Keeping memory in "smart relay"

(OP)
Does anyone know of a way I can keep the status of my "programmable logic relay" (Siemens LOGO in this case) in memory indefinitely in the event of a power loss?

For example, as the program is running power is lost for a month.  When the system is powered up again, I want the program to pick up right where it was when it left off.

Any way I can do this in the program?  (With most PLC's, you can write to a memory chip periodically & then read from it upon power-up)  I can't find a smart relay that allows me to do this.  Only thing I can get it to do is start at a given spot in the program upon power-up.

Any way I can use something (other than the super-capacitor which most of them have) to keep the memory there?

Nic Van Engen
Electrical Technician

Red Flag This Post

Please let us know here why this post is inappropriate. Reasons such as off-topic, duplicates, flames, illegal, vulgar, or students posting their homework.

Red Flag Submitted

Thank you for helping keep Eng-Tips Forums free from inappropriate posts.
The Eng-Tips staff will check this out and take appropriate action.

Reply To This Thread

Posting in the Eng-Tips forums is a member-only feature.

Click Here to join Eng-Tips and talk with other members!


Resources